to calculate the temperature values that must be entered in subindex 1 (temp value
1) to subindex 32 (temp value 32) .
If the defined characteristic range is left, the display of the motor temperature in
ru28 remains set at the final values of the characteristic (temp value 1 or temp
value 32, until the resistance value short circuit level falls below (display changes
to "short circuit“) or the resistance value no connection level is exceeded (display
changes to "no connection“).
The calculated resistance value of the temperature sensor is displayed in subindex
37 actual calculated resistance. By way the user can check the characteristic defi-
nition.
The series resistor of the evaluation circuit is displayed in subindex 38 Rv, since
the inverter does not provide a constant current source. This allows the user to es-
timate if self-heating of the sensor can falsify the measurement.
The following values must be defined for the calculation of the setting of dr30 by
the EXCEL file:
➢ Since not all sensor characteristic curves can be emulated by a cor-
responding trend line, it must be checked whether the trend line
mapps the characteristic curve with sufficient accuracy.
To Next Page
Loading...
Need help?
General
